NTSB CAROL · Event
Event WPR11CA212
Registry · N9683P
FAA Aircraft Registry record.
Make / Model
PIPER PA-18-150
Engine
LYCOMING 0-320 SERIES (180 hp)
Seats / Engines
2 seats · 1 engine
Last airworthiness date
19770330
ADS-B equipped
Yes — Mode-S AD7CAD
Registrant of record
WARTHOG FLYING SERVICE INC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The pilot’s failure to maintain directional control during the landing roll.
Factual narrative
The pilot reported that she was practicing three-point touch-and-go landings in a tailwheel equipped airplane. The first three touch-and-goes were uneventful. During the landing roll of the fourth landing, the airplane began to veer to the left. The pilot applied full right rudder, however, the airplane continued to the left and exited the runway onto a dirt surface. As the pilot added full power to attempt to avoid a taxiway sign and reenter the runway surface, the airplane briefly became airborne before pitching down and pivoting to the right. Subsequently, the left main landing gear collapsed and the left wing struck the ground resulting in substantial damage. The airplane skidded nose down until coming to a rest. At the time of the accident, the wind was reported from 110 degrees at 7 knots. The pilot reported no mechanical failures or malfunctions that would have precluded normal flight. The pilot reported that she was practicing three-point takeoffs and landings in a tailwheel-equipped airplane. The first three takeoffs and landings were uneventful. During the landing roll of the fourth landing, the airplane began to veer to the left. The pilot applied full right rudder; however, the airplane continued to the left and exited the runway onto a dirt surface. As the pilot added full power to attempt to avoid a taxiway sign and return to the runway, the airplane briefly became airborne before pitching down and pivoting to the right. Subsequently, the left main landing gear collapsed and the left wing struck the ground resulting in substantial damage. The airplane skidded nose down until coming to a rest. The wind was reported to be from 110 degrees at 7 knots at the time of the accident. The pilot reported no mechanical failures or malfunctions that would have precluded normal flight. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).
- C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Directional control-Not attained/maintained - C
- C Personnel issues-Task performance-Use of equip/info-Aircraft control-Pilot - C
Verbatim from NTSB's published report. Source file
NTSB_2011_WPR11CA212.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (icing). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- NASA NTRS 2026 · Contractor Report (CR)
Icing Physics Studies Using the 3D SIDRM Test Article: 2023 Icing Tests Analysis
In-flight icing is an important safety issue and is a factor that affects aircraft design and performance. Newer regulations are driving a need for improvements in airframe and engine icing simulation…
- arXiv 2025 · arXiv preprint
Multi-Agent Deep Reinforcement Learning for UAV-Assisted 5G Network Slicing: A Comparative Study of MAPPO, MADDPG, and MADQN
The growing demand for robust, scalable wireless networks in the 5G-and-beyond era has led to the deployment of Unmanned Aerial Vehicles (UAVs) as mobile base stations to enhance coverage in dense urb…
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER)
A Mathematical Model on the Temporal Dynamics of Aviation Competitive Pricing
This study investigates the competitive dynamics of airport pricing using U.S. airport data to validate the findings. It employs linear and nonlinear ordinary differential equation models to analyze t…
- NASA NTRS 2025 · Presentation
NASA Icing Update – March 2025
This NASA Icing Update was prepared for presentation to the SAE International AC-9C Inflight Icing Technology Committee. This update includes the following topics: planned Rotational Icing Scaling tes…
- arXiv 2024 · arXiv preprint
An energy-stable phase-field model for droplet icing simulations
A phase-field model for three-phase flows is established by combining the Navier-Stokes (NS) and the energy equations, with the Allen-Cahn (AC) and Cahn-Hilliard (CH) equations and is demonstrated ana…
- NASA NTRS 2024 · Presentation
NASA Icing Update – Oct 2024
This presentation provides a status update on select NASA icing research activities for the SAE AC-9C Icing Technical Committee Meeting on Oct 21, 2024.
Browse the full corpus — academia portal ↗